.mdl-popover {
    background: #fff;
    border: none;
    display: block;
    visibility: hidden;
    margin: 0;
    overflow: visible;
    padding: 0;
    position: absolute;
  
    &.is-visible,
    &.is-animating {
      visibility: visible;
      z-index: 999;
    }
  }
  